Is Mike Glennon Bucs' franchise QB?

The hot play we saw from rookie QB Mike Glennon back in November, when he posted quarterback ratings of more than 120 thrice in four games, has faded this month, when he has failed to even reach an 80 quarterback rating. That means the Tampa Bay Buccaneers don't really know if they have a franchise quarterback in Glennon, so they likely will bring in some competition for him during the offseason.